Resumo

ZAMORANO-AGUILAR, Pedro; SEPERIZA WITTWER, Astrid; BUSTOS CERDA, Rubén  e  ROJANO, Benjamín. Antioxidant capacity and total phenolic content of aqueous extract from matico (buddleja globosa) stem. Rev. Inv. Cs. Agro. y Vet. [online]. 2025, vol.9, n.25, pp.38-49.  Epub 27-Jan-2025. ISSN 2664-0902.  https://doi.org/10.33996/revistaalfa.v9i25.330.

Buddleja globosa (matico) is a medicinal plant native to Chile, widely recognized for the therapeutic properties of its flowers and leaves. However, its stem has been little explored and generally discarded, despite its potential as a source of bioactive compounds. The aim of this study was to investigate the polyphenol concentration and antioxidant capacity of the stem of this medicinal plant. Bioactive compounds, such as total phenols, flavonoids, vitamin C and catechin, were quantified. The antioxidant capacity was assessed using ABTS, DPPH and ORAC-H methodologies. The results showed a high concentration of total polyphenols (2749.78 mg gallic acid/100 g DW), flavonoids (2096.53 mg catechin equivalent/100 g DW) and a significant antioxidant capacity in the ORAC-H (35661.73 μmol Trolox equivalent/100 g DW), ABTS (13404.39 μmol Trolox equivalent/100 g DW) and DPPH (8268.45 μmol Trolox equivalent/100 g DW) assays. These findings highlight the value of Matico stem as a rich source of bioactive compounds. This is the first report on the stem composition of Buddleja globosa, suggesting that commonly discarded parts of the plant possess a high potential for the development of antioxidant and therapeutic products.

Palavras-chave : Antioxidants; Antioxidant capacity; Bioactive compounds; Buddleja globose; Medicinal herbs.

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